java JSON Jackson ObjectMapper ReadValue - 转换日期时出错
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JSON Hymanson ObjectMapper ReadValue - Error in converting date
提问by Punter Vicky
I am seeing the error listed below when trying to convert the json string to an object. I don't have the source code for Data class & it is part of a jar file. Is there a way I could use mixins to get this fixed?
尝试将 json 字符串转换为对象时，我看到下面列出的错误。我没有 Data 类的源代码，它是 jar 文件的一部分。有没有办法可以使用混合来解决这个问题？
CODE
代码
ObjectMapper mapper = new ObjectMapper();
mapper.readValue(request, Data.class);
ERROR
错误
org.codehaus.Hymanson.map.JsonMappingException: Can not construct instance of javax.xml.datatype.XMLGregorianCalendar from String value '10:00:00': not a valid representation (error: Can not parse date "10:00:00": not compatible with any of standard forms ("yyyy-MM-dd'T'HH:mm:ss.SSSZ", "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", "EEE, dd MMM yyyy HH:mm:ss zzz", "yyyy-MM-dd"))
org.codehaus.Hymanson.map.JsonMappingException：无法从字符串值“10:00:00”构造 javax.xml.datatype.XMLGregorianCalendar 的实例：不是有效的表示（错误：无法解析日期“10:00:00” ": 不兼容任何标准形式 ("yyyy-MM-dd'T'HH:mm:ss.SSSZ", "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", " EEE, dd MMM yyyy HH:mm:ss zzz", "yyyy-MM-dd"))
JSON REQUEST
JSON 请求
"timeSlot":{
"date":"2015-10-21",
"endTime":"10:00:00",
"startTime":"08:00:00",
}
EDIT
编辑
This issue is similar to this, however this is occuring while deserializing. The other solution helped in appropriately serializing the request.
此问题与此类似，但是这是在反序列化时发生的。另一个解决方案有助于适当地序列化请求。
I have pasted the sample code which is not working below -
我已经粘贴了下面不起作用的示例代码 -
import java.io.IOException;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeConstants;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;
import com.fasterxml.Hymanson.core.JsonParseException;
import com.fasterxml.Hymanson.core.JsonProcessingException;
import com.fasterxml.Hymanson.databind.JsonMappingException;
import com.fasterxml.Hymanson.databind.ObjectMapper;
import com.fasterxml.Hymanson.databind.SerializationFeature;
public class TestJSONDeserialize {
public static void main(String[] args){
ObjectMapper mapper = new ObjectMapper();
mapper.addMixIn(Data.class, MyMixin.class);
String jsonString = "{\"date\":\"2014-02-10\",\"time\":\"16:15:00\"}";
try {
mapper.readValue(jsonString, Data.class);
} catch (JsonParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JsonMappingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
Data class (I cannot make changes to this file)
数据类（我无法更改此文件）
import javax.xml.datatype.XMLGregorianCalendar;
public class Data {
private XMLGregorianCalendar date;
private XMLGregorianCalendar time;
public XMLGregorianCalendar getDate() {
return date;
}
public void setDate(XMLGregorianCalendar date) {
this.date = date;
}
public XMLGregorianCalendar getTime() {
return time;
}
public void setTime(XMLGregorianCalendar time) {
this.time = time;
}
}
I see the below error when I run this :
当我运行这个时，我看到以下错误：
com.fasterxml.Hymanson.databind.exc.InvalidFormatException: Can not construct instance of javax.xml.datatype.XMLGregorianCalendar from String value '16:15:00': not a valid representation (error: Failed to parse Date value '16:15:00': Can not parse date "16:15:00": not compatible with any of standard forms ("yyyy-MM-dd'T'HH:mm:ss.SSSZ", "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", "EEE, dd MMM yyyy HH:mm:ss zzz", "yyyy-MM-dd")) at [Source: {"date":"2014-02-10","time":"16:15:00"}; line: 1, column: 21] (through reference chain: com.comcast.json.test.Data["time"])
com.fasterxml.Hymanson.databind.exc.InvalidFormatException：无法从字符串值“16:15:00”构造 javax.xml.datatype.XMLGregorianCalendar 的实例：不是有效的表示（错误：无法解析日期值“16”： 15:00'：无法解析日期“16:15:00”：不兼容任何标准形式（“yyyy-MM-dd'T'HH:mm:ss.SSSZ”、“yyyy-MM-dd' T'HH:mm:ss.SSS'Z'", "EEE, dd MMM yyyy HH:mm:ss zzz", "yyyy-MM-dd")) 在 [来源：{"date":"2014-02 -10","时间":"16:15:00"}; 行：1，列：21]（通过参考链：com.comcast.json.test.Data["time"]）
采纳答案by Punter Vicky
I was able to get this done using custom deserializer and mixins. Code Below -
我能够使用自定义解串器和 mixin 来完成这项工作。下面的代码 -
import java.io.IOException;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeConstants;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;
import com.fasterxml.Hymanson.core.JsonParseException;
import com.fasterxml.Hymanson.core.JsonProcessingException;
import com.fasterxml.Hymanson.databind.JsonMappingException;
import com.fasterxml.Hymanson.databind.ObjectMapper;
import com.fasterxml.Hymanson.databind.SerializationFeature;
public class TestJSONDeserialize {
public static void main(String[] args){
ObjectMapper mapper = new ObjectMapper();
mapper.addMixIn(Data.class, NewMixin.class);
String jsonString = "{\"date\":\"2014-02-10\",\"time\":\"16:15:00\"}";
Data data = null;
try {
data = mapper.readValue(jsonString, Data.class);
} catch (JsonParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JsonMappingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(data != null){
System.out.println(" Data " + data.getDate());
System.out.println(" Data " + data.getTime());
}
}
}
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.GregorianCalendar;
import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;
import com.fasterxml.Hymanson.core.JsonParser;
import com.fasterxml.Hymanson.core.JsonProcessingException;
import com.fasterxml.Hymanson.databind.DeserializationContext;
import com.fasterxml.Hymanson.databind.JsonDeserializer;
public class CustomDateDeserializer extends JsonDeserializer<XMLGregorianCalendar> {
private static SimpleDateFormat formatter =
new SimpleDateFormat("yyyy-MM-dd");
@Override
public XMLGregorianCalendar deserialize(JsonParser jsonparser, DeserializationContext arg1) throws IOException, JsonProcessingException {
// TODO Auto-generated method stub
String date = jsonparser.getText();
try {
GregorianCalendar c = new GregorianCalendar();
c.setTime(formatter.parse(date));
XMLGregorianCalendar date2 = null;
try {
date2 = DatatypeFactory.newInstance().newXMLGregorianCalendar(c);
} catch (DatatypeConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return date2;
} catch (ParseException e) {
throw new RuntimeException(e);
}
}
}
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.GregorianCalendar;
import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;
import com.fasterxml.Hymanson.core.JsonParser;
import com.fasterxml.Hymanson.core.JsonProcessingException;
import com.fasterxml.Hymanson.databind.DeserializationContext;
import com.fasterxml.Hymanson.databind.JsonDeserializer;
public class CustomTimeDeserializer extends JsonDeserializer<XMLGregorianCalendar> {
private static SimpleDateFormat formatter =
new SimpleDateFormat("hh:mm:ss");
@Override
public XMLGregorianCalendar deserialize(JsonParser jsonparser, DeserializationContext arg1) throws IOException, JsonProcessingException {
// TODO Auto-generated method stub
String date = jsonparser.getText();
try {
GregorianCalendar c = new GregorianCalendar();
c.setTime(formatter.parse(date));
XMLGregorianCalendar date2 = null;
try {
date2 = DatatypeFactory.newInstance().newXMLGregorianCalendar(c);
} catch (DatatypeConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return date2;
} catch (ParseException e) {
throw new RuntimeException(e);
}
}
}
import javax.xml.datatype.XMLGregorianCalendar;
import com.fasterxml.Hymanson.annotation.JsonFormat;
import com.fasterxml.Hymanson.databind.annotation.JsonDeserialize;
abstract class NewMixin {
@JsonDeserialize(using = CustomDateDeserializer.class)
public abstract void setDate(XMLGregorianCalendar date);
@JsonDeserialize(using = CustomTimeDeserializer.class)
public abstract void setTime(XMLGregorianCalendar time);
}
回答by sh0rug0ru
回答by RahulArackal
Already answered in this old post, but hope this will be helpful for someone in future.
已经在这个旧帖子中回答了，但希望这对将来的人有所帮助。
Specifying DateFormatin ObjectMappersolved my issue.
指定DateFormat在ObjectMapper解决了我的问题。
objectMapper.setDateFormat(new SimpleDateFormat(MY_FORMAT));
